Astrophysics
[Submitted on 29 Apr 1997
(v1)
, last revised 25 Jun 1997 (this version, v2)]
Title: Comment on the Measurement of Cosmological Birefringence
Title: 宇宙双折射的测量评论
Abstract: Nodland and Ralston (astro-ph/9704196) claim evidence for a wavelength-independent cosmic birefringence. Although it has been shown (astro-ph/9704247, astro-ph/9704263) that the data analysed did not support this conclusion, the possibility of such an effect remains interesting. Here I present a much more accurate test using high-resolution radio images of distant radio galaxies and quasars. A preliminary application sets an upper limit about thirty times lower than the original claim.
Submission history
From: J. Patrick Leahy [view email][v1] Tue, 29 Apr 1997 19:14:34 UTC (38 KB)
[v2] Wed, 25 Jun 1997 22:58:30 UTC (43 KB)
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